Does Immerse Gaming Software work with Cyberpunk? If yes, why do I need to buy a separate license for Immerse Gamepack Cyberpunk i.e. what are the additional benefits?

The Immerse Gaming software will not work with the Immerse Gamepack Cyberpunk app. Immerse Gaming software relies on a surround sound output from the game, whereas the Immerse Gamepack provides a unique spatial audio experience that has been developed and tuned in conjunction with the sound designers of each specific game. The whole application and its UI are also customized to match each game design.

Since the spatial audio tuning and integration depend on the game, Immerse Gamepack only works with the game it's been designed for.